/*******************************************************************************
 * Copyright 2011 Mauro Luigi Drago (drago.luigi@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.bytenose.extrautils.functional;

/**
 * A 3-arity tuple.
 * @author Mauro Luigi Drago
 *
 * @param <A1> the type of the first value.
 * @param <A2> the type of the second value.
 * @param <A3> the type of the third value.
 * @param <A4> the type of the fourth value.
 */
public interface ITuple4<A1, A2, A3, A4> {
	
	/**
	 * Gets the first value.
	 * @return the value.
	 */
	A1 getValue1();
	
	/**
	 * Gets the second value.
	 * @return the value.
	 */
	A2 getValue2();
	
	/**
	 * Gets the third value.
	 * @return the value.
	 */
	A3 getValue3();
	
	/**
	 * Gets the fourth value.
	 * @return the value.
	 */
	A4 getValue4();
	
	/**
	 * Materializes this tuple.
	 * If the actual type is already materialized,
	 * the same object is returned.
	 * @return the materialized tuple.
	 */
	ITuple4<A1, A2, A3, A4> materialize();
}
